A Modular Synthesis of Polysubstituted Indolizines
作者:Murat Kucukdisli、Till Opatz
DOI:10.1002/ejoc.201200424
日期:2012.8
furnish polysubstituted indolizines. Overall, the indolizine core can be constructed from a pyridine, two aldehydes, and a nitroalkane, and no undesired functional groups remain in the products. When bromoacetonitrile was used for the N-alkylation, indolizine-3-carbonitriles were obtained instead. The pyridine component may be replaced by other azines, giving rise to relatedheterocyclic systems.
Two-Step Synthesis of 2-Aminoindolizines from 2-Alkylpyridines
作者:Murat Kucukdisli、Till Opatz
DOI:10.1002/ejoc.201402618
日期:2014.9
An efficient method for the synthesis of 2-aminoindolizines by the 5-exo-dig cyclization of 2-alkyl-1-(1-cyanoalkyl)pyridinium salts has been developed. These substrates were prepared by N-alkylation of 2-alkylpyridines with readily available cyanohydrin triflates. The method allows the introduction of various substituents at the 1-, 3-, 6-, 7-, and 8-positions and leaves no undesired acceptor groups